carbon dioxide

removed by photosynthesis

dissolves in rainwater, seas, lakes

increasing due to human activity

contributing to global warming

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carbon monoxide


produced when theres not enough oxygen present - incomplete burning

poisonous - drowsy, headaches, possibility to kill

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particulate carbon

produced when fuels burn incompletely

float around in atmosphere

fall back to ground and deposit as soot

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sulfur dioxide

comes from impurities in fuels when they are extracted from the Earth

when fuel burns, so does sulfur.

combine with oxygen to make sulfur dioxide, ends up in atmosphere

sulfur dioxide reacts with moisture in clouds to form dilute sulfuric acid (acid rain)

can cause lakes to become acidic, kills trees and damages statues eg limestone

can be removed from chimney flues by wetscrubbing with an alkali:

1) seawater

dissolved in seawater, producing carbon dioxide, water and dissolved sulfate.

2)calcium oxide slurry

slurry is sprayed onto gases and sulfur dioxide reacts with calcium oxide. calcium sulfite (s) waste product is formed.

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nitrogen oxides

formed when nitrogen and oxygen are exposed to very high temps eg in a car engine

once in the air, NO will go on to react with more oxygen forming nitrogen DIoxide

both react in air to produce dilute nitric acid (acid rain)

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